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Fluid flow and heat transfer over corrugated backward facing step channe

The convective heat transfer and flow field characteristics through a backward-facing step (BFS) channel combined with a corrugated wall is investigated numerically and experimentally. Uniform heat flux is applied on 200 mm of the downstream wall, while the rest of the walls are considered isolated...

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Main Authors: Abu Talib, Abd. Rahim, Hilo, Ali Kareem
Format: Article
Language:English
Published: Elsevier 2021
Online Access:http://psasir.upm.edu.my/id/eprint/97365/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/97365/
https://www.sciencedirect.com/science/article/pii/S2214157X21000253
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spelling my.upm.eprints.973652022-09-05T08:43:16Z http://psasir.upm.edu.my/id/eprint/97365/ Fluid flow and heat transfer over corrugated backward facing step channe Abu Talib, Abd. Rahim Hilo, Ali Kareem The convective heat transfer and flow field characteristics through a backward-facing step (BFS) channel combined with a corrugated wall is investigated numerically and experimentally. Uniform heat flux is applied on 200 mm of the downstream wall, while the rest of the walls are considered isolated surfaces. The range of Reynolds number (Re) of the flow was between 5000 and 20,000. The governing equations were solved using the RNG turbulent model. The effects of wavelength and amplitude height of the corrugated wall on the friction factor and Nusselt number are studied. The results indicated that the fluid flow in the BFS channel combined with the corrugated wall significantly enhanced the heat transfer with increased friction. The average increase in the heat transfer rate and friction factor in the experiment is 40.7% and 46.2% respectively. The simulation results are comparable to the experimental ones. According to the simulations, the channel with an amplitude height of 4 mm and a wavelength of 20 mm has the highest heat transfer enhancement, reaching a performance evaluation criterion factor of 1.33 at 5000 Re. Elsevier 2021 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/97365/1/ABSTRACT.pdf Abu Talib, Abd. Rahim and Hilo, Ali Kareem (2021) Fluid flow and heat transfer over corrugated backward facing step channe. Case Studies in Thermal Engineering, 24. art. no. 100862. pp. 1-29. ISSN 2214-157X https://www.sciencedirect.com/science/article/pii/S2214157X21000253 10.1016/j.csite.2021.100862
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description The convective heat transfer and flow field characteristics through a backward-facing step (BFS) channel combined with a corrugated wall is investigated numerically and experimentally. Uniform heat flux is applied on 200 mm of the downstream wall, while the rest of the walls are considered isolated surfaces. The range of Reynolds number (Re) of the flow was between 5000 and 20,000. The governing equations were solved using the RNG turbulent model. The effects of wavelength and amplitude height of the corrugated wall on the friction factor and Nusselt number are studied. The results indicated that the fluid flow in the BFS channel combined with the corrugated wall significantly enhanced the heat transfer with increased friction. The average increase in the heat transfer rate and friction factor in the experiment is 40.7% and 46.2% respectively. The simulation results are comparable to the experimental ones. According to the simulations, the channel with an amplitude height of 4 mm and a wavelength of 20 mm has the highest heat transfer enhancement, reaching a performance evaluation criterion factor of 1.33 at 5000 Re.
format Article
author Abu Talib, Abd. Rahim
Hilo, Ali Kareem
spellingShingle Abu Talib, Abd. Rahim
Hilo, Ali Kareem
Fluid flow and heat transfer over corrugated backward facing step channe
author_facet Abu Talib, Abd. Rahim
Hilo, Ali Kareem
author_sort Abu Talib, Abd. Rahim
title Fluid flow and heat transfer over corrugated backward facing step channe
title_short Fluid flow and heat transfer over corrugated backward facing step channe
title_full Fluid flow and heat transfer over corrugated backward facing step channe
title_fullStr Fluid flow and heat transfer over corrugated backward facing step channe
title_full_unstemmed Fluid flow and heat transfer over corrugated backward facing step channe
title_sort fluid flow and heat transfer over corrugated backward facing step channe
publisher Elsevier
publishDate 2021
url http://psasir.upm.edu.my/id/eprint/97365/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/97365/
https://www.sciencedirect.com/science/article/pii/S2214157X21000253
_version_ 1744355327736807424
score 13.211869

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